dependencies are optional

Overall-architecture.md

@@ -370,7 +370,7 @@ Mandatory items are bold, optional italic.
   - **task-id** - unique indetifier of task in scope of one submission
   - **priority** - higher number, higher priority
   - **fatal-failure** - if true, than execution of whole job will be stopped after failing of this one
-  - **dependencies** - list of dependencies which have to be fulfilled before this task, can be omitted if there is no dependencies
+  - _dependencies_ - list of dependencies which have to be fulfilled before this task, can be omitted if there is no dependencies
   - **cmd** - description of command which will be executed
     - **bin** - the binary itself (full path of external command or name of internal task)
     - _args_ - list of arguments which will be sent into execution unit